Our audio device has 6 sound groups, each with 5 categories of switchable sound scenes, which enable 30-level volume control. The sound features 30 soothing high fidelity sounds such as white noise, pink noise, brown noise, rain, running water, fan, tires, hypnosis, fire, waves, singing birds. They are perfect for birthdays, Thanksgiving, Halloween, Christmas and other holiday gifts for family, children or friends. 3 Timer and Memory Functions: STYFSCP white noise can be set for continuous playback all night or a 30, 60 minute auto-off timer that you can adjust according to your needs. When the timer expires, the sound fades out and then fades out again. In addition, the Noise has a memory function and a headphone jack that automatically restores the volume, tone and timer settings from the last time you turned it off, so you never have to reset them. USB and portable adapters: The speaker is equipped with a 5V/1A power adapter and a 1.5m USB power cable, which can play the sound without additional purchase. The sound is made of high quality ABS material, which is sturdy and durable. It is very light and portable, weighing only 0.45 pounds and measuring 4.3 x 4.3 x 2.5 inches. Whether at home, in the office or when traveling, it is the ideal choice for you to enjoy the comfort and relaxation of the noise machine anywhere. Flexible Buttons and Night Lights: Our white noise machine has 2 lights and 5 buttons that can be activated for 3 seconds. You can click ON/OFF and switch the lighting mode (breathing/on) by long pressing the lighting brightness level. Soft night lights make it easier to find things in the dark and create a warm, cozy environment that helps you fall asleep faster and easier. The mother feeds the newborn in the evening, changes the diapers, very well. Risk-free purchase and packaging include: The speaker has passed FCC, CE and RoHS certification, product safety, don't worry. We offer 90 days free replacement and 2 years warranty. If you have any problems, please feel free to contact us. We will solve you within 12 hours. The costume includes: 1*white noise machine, 1*power adapter (5V/1A), 1*USB power cable and 1*user manual.